Information Transmission Method and Device

1. A method, comprising: determining, by a terminal device when an uplink-downlink configuration between the terminal device and a network device is a first uplink-downlink configuration, a first resource to use to transmit first information; before the first information is transmitted, receiving, by the terminal device, indication information from the network device, wherein the indication information indicates that the uplink-downlink configuration between the terminal device and the network device has changed from the first uplink-downlink configuration to a second uplink-downlink configuration; when the terminal device receives the indication information from the network device, or after the terminal device receives the indication information from the network device, receiving, by the terminal device, second scheduling information of the first information from the network device, wherein the second scheduling information indicates a second resource; determining, by the terminal device based on the indication information and the second scheduling information, the second resource to use to transmit the first information; and transmitting, by the terminal device, the first information with the network device using the second resource.

2. The method according to claim 1 , wherein determining the first resource to use to transmit the first information comprises: receiving, by the terminal device, first scheduling information of the first information from the network device, wherein the first scheduling information indicates the first resource; and determining, by the terminal device, the first resource based on the first scheduling information.

3. The method according to claim 1 , wherein: the first resource is used for first direction transmission in the first uplink-downlink configuration; and the first resource is used for second direction transmission and the second resource is used for the first direction transmission in the second uplink-downlink configuration.

4. The method according to claim 3 , wherein: the first resource is a first time unit, and the second resource is the first time unit, and the second resource follows the first resource in the second uplink-downlink configuration; or a time domain resource of the first resource is a first time unit, a time domain resource of the second resource is the first time unit, and the time domain resource of the second resource follows the time domain resource of the first resource in the second uplink-downlink configuration.

5. A device, comprising: a processor; a non-transitory computer-readable storage medium storing a program to be executed by the processor, the program including instructions for: determining, when an uplink-downlink configuration between the device and a network device is a first uplink-downlink configuration, a first resource to use to transmit first information, wherein the first information is first feedback information indicating whether first data is correctly received, and the first resource is a first time unit; and a transceiver, configured to: before the first information is transmitted, receive indication information from the network device, wherein the indication information indicates that the uplink-downlink configuration between the device and the network device has changed from the first uplink-downlink configuration to a second uplink-downlink configuration; and wherein the program further includes instructions for: determining a second resource index based on a first resource index and a first index offset, wherein the second resource index satisfies a relation of n=n+n offset , wherein n is the first resource index, the first resource index is of a resource used to transmit the first feedback information in a third resource, a time domain resource of the third resource is the first time unit, n is the second resource index, the second resource index is of a resource used to transmit the first feedback information in a fourth resource, a time domain resource of the fourth resource is a second time unit, and n offset is the first index offset; determining, based on the indication information received by the transceiver, the second resource to use to transmit the first information, wherein the second resource is the second time unit; and wherein the transceiver is further configured to: transmit or receive the first information using the second resource on a time-frequency resource corresponding to the second resource index.

6. The device according to claim 5 , wherein: the transceiver is further configured to: receive first scheduling information of the first information from the network device, wherein the first scheduling information indicates the first resource; and the program includes instructions for determining the first resource based on the first scheduling information.

7. The device according to claim 5 , wherein: the first resource is used for first direction transmission in the first uplink-downlink configuration; and the first resource is used for second direction transmission and the second resource is used for the first direction transmission in the second uplink-downlink configuration.

8. The device according to claim 7 , wherein the program further includes instructions for: determining the first index offset based on an index of the second time unit, the second uplink-downlink configuration, and a mapping table, wherein the mapping table records a correspondence among the index of the second time unit, the second uplink-downlink configuration and the first index offset, or the mapping table records a correspondence among the index of the second time unit, the second uplink-downlink configuration, and an offset parameter, wherein the offset parameter is used to determine the first index offset.

9. The device according to claim 7 , wherein the program further includes instructions for: determining the first index offset based on offset information received by the transceiver from the network device, wherein the offset information indicates the first index offset.

10. A device, comprising: a processor; and a non-transitory computer-readable storage medium storing a program to be executed by the processor, the program including instructions for: determining, when an uplink-downlink configuration between the device and a terminal device is a first uplink-downlink configuration, a first resource to use to transmit first information; and a transceiver, configured to, before the first information is transmitted, send indication information after determining that the uplink-downlink configuration between the device and the terminal device has changed from the first uplink-downlink configuration to a second uplink-downlink configuration, wherein the indication information indicates that the uplink-downlink configuration has changed to the second uplink-downlink configuration; wherein the program further includes instructions for determining, based on the second uplink-downlink configuration, a second resource to use to transmit the first information; and wherein the transceiver is further configured to: when sending the indication information, or after sending the indication information, send second scheduling information of the first information, wherein the second scheduling information indicates the second resource; and transmit or receive the first information on the second resource.

11. The device according to claim 10 , wherein the transceiver is further configured to: before sending the indication information, send first scheduling information of the first information to the terminal device, wherein the first scheduling information indicates the first resource.

12. The device according to claim 10 , wherein: the first resource is used for first direction transmission in the first uplink-downlink configuration; and the first resource is used for second direction transmission and the second resource is used for the first direction transmission in the second uplink-downlink configuration.